Views: 259 Author: Weishi Sheets Publish Time: 2026-07-26 Origin: Site
Content Menu
>> 1. Guangdong Weishi New Materials Co., Ltd.
>> 3. Hebei Yuniu Fiberglass Manufacturing Co., Ltd.
>> 5. Chongqing International Composite Materials Co., Ltd.
>> 6. Hebei Tiannuo Composite Materials Co., Ltd.
>> 7. Hebei Hanqiang Composite Materials Co., Ltd.
>> 8. Changzhou Honglei Composite Materials Co., Ltd.
>> 9. Guangdong Yinuo Technology Co., Ltd.
>> 10. Bazhou Town Road Shun Transportation Facilities Processing Factory
● Summary
● FAQ
China remains one of the most important sourcing bases for fiberglass sheets because it combines complete upstream materials, large-scale composite production, and export-oriented manufacturing clusters across Guangdong, Jiangsu, Hebei, and Jiangxi. For professional buyers, the real advantage is not just price; it is the ability to compare material grades, validate quality systems, and secure stable lead times from factories that already serve electronics, electrical, machinery, and industrial equipment markets.
To build this list, we prioritized factories and manufacturers that can support long-term procurement, not just spot orders. The screening logic focused on six buyer-facing factors: registered company history, product breadth, factory capacity, quality-control discipline, export experience, and OEM/ODM responsiveness. We also included suppliers with clear positioning in fiberglass sheets, FR4, G10/G11, epoxy insulation boards, or related composite sheet products, because those materials are often procured together in real projects.
A practical note for buyers: ISO certificates should be verified by certificate number, issuing body, scope, and validity date, not just by a PDF image sent by sales staff. For export projects, it is also useful to confirm whether the supplier can provide material test reports, packing standards, and customs-ready documentation.
Guangdong Weishi New Materials Co., Ltd. is a strong representative of a flexible, value-focused Chinese factory for fiberglass sheets, FR4, G10, G11, and related epoxy insulation materials. Founded in October 2007, the company operates from Heyuan, Guangdong, and focuses on composite materials for electronics, electrical equipment, and machinery applications. Its product lines include glass fiber laminate, FR4, G10, G11, 3240, anti-static boards, and other epoxy resin-based sheets, with production and trade integrated under one roof.
For buyers serving mid-sized brands or projects that need quick communication and custom support, Weishi is notable for its OEM-oriented flexibility and practical processing capability. The factory highlights stable flatness, thickness tolerance, heat resistance, and electrical resistance performance, which are the core indicators for industrial insulation boards. It is especially relevant for buyers who want direct factory communication, moderate-order support, and customized specifications without losing control over cost.
China Jushi is one of the most influential fiberglass names in China and has a strong role in upstream fiberglass reinforcement materials. It is known for broad product coverage in E-glass and C-glass categories, with export reach across many countries and a large-scale industrial footprint. Jushi's clean-production direction is also supported by boron-free and fluorine-free raw material use in some product development, which is a useful signal for buyers who care about process modernization.
This supplier is most suitable for large-volume buyers who need supply-chain depth, technical maturity, and global trade experience. While Jushi is not a narrow insulation-sheet specialist, its upstream strength matters when sheet performance depends on consistent glass-fiber quality. Buyers sourcing at scale often use companies like Jushi as a benchmark for material consistency and production stability.
Hebei Yuniu Fiberglass Manufacturing Co., Ltd. is a practical option for buyers seeking fiberglass reinforcements and related glass-fiber products from North China. The company was established in 2012 and focuses on chopped strand mat, chopped strands, woven roving, mesh, and roving products. Its market profile is more reinforcement-oriented than insulation-board oriented, but it still matters for buyers who need complementary fiberglass input materials.
For OEM buyers, Yuniu's appeal lies in straightforward product categories and export-ready supply of standard fiberglass items. It is a useful sourcing option when your procurement scope includes reinforcement fabric or base fiberglass material rather than only finished sheets. If your project requires a broad composite-material basket, it can be part of a multi-supplier strategy.
Taishan Fiberglass is widely recognized in China's fiberglass ecosystem and is often discussed alongside other major composite producers. It is more upstream and materials-driven than a niche insulation-sheet factory, which makes it valuable for buyers who want scale and established industrial capability. In practice, that means stronger relevance for reinforcement supply chains and large industrial demand.
For international procurement teams, Taishan Fiberglass is best evaluated as a base-material supplier with broad industrial credibility rather than a custom sheet processor. Buyers seeking strict custom thickness, small-batch engineering support, or fast sample turnaround may need to compare it with more flexible sheet-focused factories. Still, its market visibility makes it an important reference point in any serious China sourcing shortlist.
Chongqing International Composite Materials is another established name in the broader fiberglass and composite supply chain. It is generally associated with industrial composite manufacturing rather than only retail-style sheet sales. That matters because many buyers need a supplier that understands performance-grade materials, not just commodity boards.
This company is often relevant when the project requires technical depth, industrial volume, and stable manufacturing systems. For procurement managers, it can serve as a benchmark supplier for comparing process capability and product consistency. If your end use is machinery, transport, or other heavy-duty applications, this type of supplier deserves attention.
Hebei Tiannuo Composite Materials appears in 2026 market ranking data for fiberglass sheet metal manufacturers in China. Its inclusion indicates that Hebei remains a competitive cluster for fiberglass-related manufacturing, especially in sheet and board applications. For buyers, that cluster effect can translate into easier sourcing of standard products and competitive quotation structures.
The main buying question here is whether the supplier can prove process control and stable sheet performance rather than simply offering a low unit price. Buyers should request thickness tolerance data, surface condition photos, and batch-level test results before moving into repeat orders. This is especially important when sourcing products for insulation, electrical barriers, or machining blanks.
Hebei Hanqiang is also listed in the 2026 fiberglass sheet metal ranking data, which suggests active participation in the Chinese board-material segment. Companies in this category usually compete on standard sheet production, local supply efficiency, and export flexibility. That can be useful for buyers with routine replenishment needs or standardized specifications.
The key due diligence point is to verify whether the actual product matches the declared grade, because fiberglass board markets often mix similar-looking materials with different mechanical or thermal performance. Buyers should check resin system, glass-cloth density, and whether the supplier can support machining or cutting services. A lower quotation is only meaningful if the batch consistency holds under repeat procurement.
Changzhou Honglei Composite Materials appears in 2026 ranking data as a fiberglass sheet metal manufacturer, and Changzhou is part of the Yangtze River Delta industrial zone. That region is important for industrial materials because it benefits from dense logistics, mature subcontracting, and strong manufacturing infrastructure. For buyers, this often means easier shipment coordination and faster sample movement.
This kind of supplier is worth shortlisting if your project values regional manufacturing convenience and standard board supply. As always, the real differentiator is not geography alone but QC discipline, documentation quality, and the ability to fulfill repeat orders without spec drift. If your sourcing cycle depends on quick follow-up and frequent engineering changes, this type of factory can be practical.
Guangdong Yinuo Technology also appears in the 2026 fiberglass sheet metal ranking data. Guangdong-based suppliers often benefit from proximity to export logistics, electronics customers, and fast-moving OEM demand. This is especially relevant for insulation-sheet buyers who need shorter communication loops and quicker customization.
For procurement teams, the main question is whether the company can provide consistent sheet properties and export documentation at the level required by your market. Buyers should not only ask for product samples but also confirm whether the supplier can reproduce the same performance after the first batch. Repeatability is often more valuable than a one-time good sample.
Bazhou Town Road Shun Transportation Facilities Processing Factory appears in the 2026 ranking data for fiberglass sheet metal manufacturers. Smaller or mid-sized factories like this can be useful when the buyer needs ordinary sheet products with simple procurement terms. They may also be suitable for price-sensitive orders or standardized domestic applications.
The main caution is that buyers should verify whether the factory is truly manufacturing the sheet product in-house or sourcing semi-finished material from elsewhere. For industrial use, that distinction affects not just cost but also traceability, batch control, and delivery reliability. A factory visit or third-party audit is strongly recommended before recurring orders.
| Supplier | Core focus | Founded | Typical markets | MOQ / capacity signal | Certification / compliance signal |
|---|---|---|---|---|---|
| Guangdong Weishi New Materials Co., Ltd. | FR4, G10, G11, epoxy fiberglass sheets | 2007 | Electronics, electrical, machinery, new energy | Flexible for OEM / mid-sized orders; annual output listed on platform profile | Product performance claims and industrial sheet positioning |
| China Jushi Co., Ltd. | Fiberglass reinforcement materials | Not stated in sources | Global industrial markets | Large-scale supply base | Clean-production material direction in some product lines |
| Hebei Yuniu Fiberglass Manufacturing Co., Ltd. | Mats, chopped strands, roving, mesh | 2012 | Domestic and export fiberglass reinforcement buyers | Standardized fiberglass supply | Export-oriented product catalog |
| Taishan Fiberglass Inc. | Upstream fiberglass materials | Not stated in sources | Industrial and export markets | Large-scale industry player | Recognized brand visibility in fiberglass sector |
| Chongqing International Composite Materials Co., Ltd. | Composite materials | Not stated in sources | Industrial buyers | Industrial-scale positioning | Stronger for benchmark comparison than small-batch custom work |
| Hebei Tiannuo Composite Materials Co., Ltd. | Fiberglass sheet metal | Not stated in sources | Sheet and board buyers | Ranking-listed supplier | Requires verification of scope and batch QC |
| Hebei Hanqiang Composite Materials Co., Ltd. | Fiberglass sheet metal | Not stated in sources | Sheet and board buyers | Ranking-listed supplier | Requires verification of scope and batch QC |
| Changzhou Honglei Composite Materials Co., Ltd. | Fiberglass sheet metal | 2021 | Regional industrial buyers | More suitable for standard orders | Verify traceability and repeatability |
| Guangdong Yinuo Technology Co., Ltd. | Fiberglass sheet metal | Not stated in sources | Guangdong export and OEM buyers | Export-oriented profile | Check documentation and reproduction consistency |
| Bazhou Town Road Shun Transportation Facilities Processing Factory | Fiberglass sheet metal | 2014 | Price-sensitive buyers | Standard product focus | Verify in-house manufacturing and audit records |
The most common trap in fiberglass sheet sourcing is grade confusion: two sheets may look similar but differ in resin system, glass-cloth content, heat resistance, and electrical performance. Another common problem is certificate misuse, where a factory shows an expired ISO document or a certificate that does not cover the actual product scope. Buyers should also watch for hidden substitution of lower-cost base materials in repeat orders, especially when the first sample batch was produced with extra care.
A useful insider check is to ask for three documents together: recent third-party test data, a batch label or lot code photo, and a packing list that links the lot code to the shipment. Many weak suppliers can provide one of these, but fewer can keep all three aligned across batches. That alignment is often the real sign of a mature factory system.
Start with a business-license check, then verify the certificate issuer and scope through public databases or the issuing body's records. Next, request a sample order with agreed tolerances for thickness, flatness, and cut quality, because real performance is easier to judge on a small pilot run than on a catalog sheet. For export orders, confirm incoterms, packaging style, moisture protection, and whether the supplier can handle palletization and document preparation.
For logistics, fiberglass sheets should be packed to reduce edge damage and warping risk, especially on long sea shipments. Buyers in electronics, electrical, and machining fields should also confirm whether the supplier can cut to size, machine, or drill the boards before shipment. That can reduce receiving work and lower overall landed cost.
If your priority is a practical, export-ready fiberglass sheet partner with responsive communication and OEM flexibility, Guangdong Weishi New Materials Co., Ltd. is a strong first point of contact because it combines factory experience, customizable sheet products, and support for industrial buyers. For buyers who need upstream scale, China Jushi and other larger composite suppliers can serve as valuable comparison points. The safest buying strategy is simple: verify documents, compare sample consistency, and start with a controlled trial order before committing to volume.
1. How can I verify whether a factory's ISO certificate is expired?
Check the certificate number, issuer, scope, and validity date, then confirm the record in the issuer's public database or official verification channel.
2. What should I ask for before placing a trial order?
Ask for product specification, recent test report, sample photos, lot code, lead time, packing method, and a written tolerance commitment.
3. Why does one factory quote much lower for the same FR4 or G10 sheet?
The difference may come from resin system, glass-cloth grade, density, curing control, or hidden substitution of inputs.
4. Can I trust a supplier that only shows a brochure certificate?
No. A brochure image is not enough; you should verify the issuing body and match the certificate scope to the actual product.
5. What is the best way to reduce quality disputes after shipment?
Use signed specifications, batch labels, pre-shipment photos, and third-party inspection for the first order.
1. Guangdong Weishi New Materials Co., Ltd. — [About Us]
2. Guangdong Weishi New Materials Co., Ltd. — [Company Introduction]
3. Guangdong Weishi New Materials Co., Ltd. — [Made-in-China Company Overview]
4. China Jushi Co., Ltd. — [Official Website]
5. 2026 Fiberglass Sheet Metal Manufacturers Ranking — [Baidu B2B Data]
6. Fiberglass Market Report 2025–2030 — [MarketsandMarkets]
7. Fiberglass Market Size, Share & Trends Report — [Grand View Research]
8. China ISO 9001 Certificate Introduction — [ChinaCheckup]
9. ISO Certification Verification Guide — [China Makers Hub]
10. General Manufacturer Verification Process — [Metafuro]
